Portable storage device



FIG. 1 is a perspective view of a portable storage device;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a right-side view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM We claim the ornamental design for a portable storage device, as shown and described. 